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Security modes
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<h2 id="dedicated-security-mode">Dedicated security mode</h2> <p>In this mode of operation, all users must have: </p> <ul><li>Signed <a href="/facts/Non-disclosure_agreement/3q1t9J05">NDA</a> for <i>ALL</i> information on the system.</li> <li>Proper clearance for <i>ALL</i> information on the system.</li> <li>Formal access approval for <i>ALL</i> information on the system.</li> <li>A valid <a href="/facts/Need_to_know/DoHevG3F">need to know</a> for <i>ALL</i> information on the system.</li></ul> <p>All users can access <i>ALL</i> data. </p> <h2 id="system-high-security-mode">System high security mode</h2> <p>In <a href="/facts/System_high_mode/vdyywa5q">system high mode</a> of operation, all users must have: </p> <ul><li>Signed <a href="/facts/Non-disclosure_agreement/3q1t9J05">NDA</a> for <i>ALL</i> information on the system.</li> <li>Proper clearance for <i>ALL</i> information on the system.</li> <li>Formal access approval for <i>ALL</i> information on the system.</li> <li>A valid <a href="/facts/Need_to_know/DoHevG3F">need to know</a> for <i>SOME</i> information on the system.</li></ul> <p>All users can access <i>SOME</i> data, based on their <a href="/facts/Need_to_know/DoHevG3F">need to know</a>. </p> <h2 id="compartmented-security-mode">Compartmented security mode</h2> <p>In this mode of operation, all users must have: </p> <ul><li>Signed <a href="/facts/Non-disclosure_agreement/3q1t9J05">NDA</a> for <i>ALL</i> information on the system.</li> <li>Proper clearance for <i>ALL</i> information on the system.</li> <li>Formal access approval for <i>SOME</i> information they will access on the system.</li> <li>A valid <a href="/facts/Need_to_know/DoHevG3F">need to know</a> for <i>SOME</i> information on the system.</li></ul> <p>All users can access <i>SOME</i> data, based on their <a href="/facts/Need_to_know/DoHevG3F">need to know</a> and formal access approval. </p> <h2 id="multilevel-security-mode">Multilevel security mode</h2> <p>In <a href="/facts/Multilevel_security/yyCAmDEP">multilevel security</a> mode of operation (also called Controlled Security Mode), all users must have: </p> <ul><li>Signed <a href="/facts/Non-disclosure_agreement/3q1t9J05">NDA</a> for <i>ALL</i> information on the system.</li> <li>Proper clearance for <i>SOME</i> information on the system.</li> <li>Formal access approval for <i>SOME</i> information on the system.</li> <li>A valid <a href="/facts/Need_to_know/DoHevG3F">need to know</a> for <i>SOME</i> information on the system.</li></ul> <p>All users can access <i>SOME</i> data, based on their <a href="/facts/Need_to_know/DoHevG3F">need to know</a>, clearance and formal access approval </p> <h2 id="summary">Summary</h2> <table><tbody><tr><th></th><th>Signed NDA for</th><th>Proper clearance for</th><th>Formal access approval for</th><th>A valid need to know for</th></tr><tr><td>Dedicated security mode</td><td>ALL information on the system.</td><td>ALL information on the system.</td><td>ALL information on the system.</td><td>ALL information on the system.</td></tr><tr><td>System high security mode</td><td>ALL information on the system</td><td>ALL information on the system</td><td>ALL information on the system</td><td>SOME information on the system</td></tr><tr><td>Compartmented security mode</td><td>ALL information on the system</td><td>ALL information on the system</td><td>SOME information on the system</td><td>SOME information on the system</td></tr><tr><td>Multilevel security mode</td><td>ALL information on the system</td><td>SOME information on the system</td><td>SOME information on the system</td><td>SOME information on the system</td></tr></tbody></table> <h2 id="see-also">See also</h2> <ul><li><a href="/facts/Access_control/08zE5Pz8">Access control</a></li> <li><a href="/facts/Authentication/64y4S69b">Multifactor authentication</a></li> <li><a href="/facts/Bell%25E2%2580%2593LaPadula_model/aWl1Fc7R">Bell–LaPadula model</a></li> <li><a href="/facts/Biba_model/qRGPXRSm">Biba model</a></li> <li><a href="/facts/Clark-Wilson_model/TFSP6xe3">Clark-Wilson model</a></li> <li><a href="/facts/Discretionary_access_control/MTQRM7nr">Discretionary access control</a> (DAC)</li> <li><a href="/facts/Graham-Denning_model/0ujp7tX2">Graham-Denning model</a></li> <li><a href="/facts/Multilevel_security/yyCAmDEP">Multilevel security</a> (MLS)</li> <li><a href="/facts/Mandatory_access_control/yvtGFacq">Mandatory access control</a> (MAC)</li> <li><a href="/facts/Security/B4uxkyxh">Security</a></li> <li><a href="/facts/Security_engineering/A2lhQ8YF">Security engineering</a></li> <li><a href="/facts/Take-grant_model/raCnvCwY">Take-grant model</a></li></ul> <ul><li>Krutz, Ronald L. and Vines, Russell Dean, The CISSP Prep Guide; Gold Edition, Wiley Publishing, Inc., Indianapolis, Indiana, 2003.</li></ul> <h2 id="external-links">External links</h2> <ul><li><a href="https://web.archive.org/web/20110605223833/http://csrc.nist.gov/groups/SMA/fasp/documents/c%26a/DLABSP/d520028p.pdf">DoD 5200.28</a> defines the security terms</li></ul>